[Bug] LLM Token Usage and Metadata Lost in Runtime Layer — Not Exposed in API Responses #75
Description
Description
The core Agent framework correctly captures and returns TokenUsage and other metadata in response.
However, the Runtime layer discards this information when adapting and passing the final response to clients.
As a result:
- End users or frontend cannot see how many tokens were used
- Billing, auditing, and optimization use cases are blocked
- Observability is incomplete despite data being available internally
This is a data loss issue in the runtime pipeline